Arctic Blast Tied to Polar Vortex Puts U.S., Europe in Deep Freeze
Arctic Blast Tied to Polar Vortex Puts U.S., Europe in Deep Freeze What is a Polar Vortex? A polar vortex is a large area of low pressure and cold air that surrounds the North and South Poles. The polar vortex typically stays near the poles, but sometimes it can weaken and bulge southward, bring